How does packet switching combine signals from different sou

How does packet switching combine signals from different sources?

a) It assigns each one a different wavelength

b) it packages them into a series of packets, with headers indicating destinations.

c) it assigns each one a different series of time slots in a sequence of bits.

d) It transmits them simultaneously at different frequencies.

e) none of the above

Solution

b) it packages them into a series of packets, with headers indicating destinations.